warships, 50 marines have been deployed to libya to beef up security at diplomatic facilities, and the fbi is sending teams to determine who is responsible for the attack. a scene on youtube was initially blamed for inciting the attack. some have suggested it was done to coerce with the anniversary of 9/11. >> this was not a demonstration gone bad. >> we can't afford to view the despicable acts of violence perpetrated yesterday by a small group of fanatics as in any way representative of the country and the people of libya. >> reporter: the president ordered american flags to be flown at half staff at government buildings, and at ships at sea around the world until sunset on september 16. >>> just hours before the attack in benghazi, thousands of egyptians protested at the u.s. embassy in cairo enraged over that film about the prophet mohammed. they pulled down a u.s. flag and destroyed it. their rage was sparked by an independent film on the internet that depicts mohammed as a philanderer. >>> in 16 minutes, how youtube is handling the film tonight, and the debate over free speech, everyo